[Bug 1812594] Re: Lubuntu 18.04 mistakenly sets the default lock problem to lxlock instead of light-locker

[Brian Murray]

Hello Chris, or anyone else affected,

Accepted lubuntu-default-settings into bionic-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/lubuntu-default-settings/0.54.3 in a few hours, and then in the
-proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-bionic to verification-done-bionic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-bionic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: lubuntu-default-settings (Ubuntu Bionic)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-bionic

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https://bugs.launchpad.net/bugs/1812594

Title:
  Lubuntu 18.04 mistakenly sets the default lock problem to lxlock
  instead of light-locker

Status in lubuntu-default-settings package in Ubuntu:
  Invalid
Status in lubuntu-default-settings source package in Bionic:
  Fix Committed

Bug description:
  [Summary]

  Instead to light-locker-command, the keyboard shortcut to lock the screen is bound to lxlock. The problem is, that lxlock is not included in the iso of the first two point releases (18.04 and 18.04.1) and therefore, the shortcut does not work.
  The ability to lock the screen is a basic security feature and should work as expected, even with the provided shortcut.

  
  [Test Case]

  Steps to reproduce
  ------------------

  1. Boot Lubuntu 18.04 (installed from an older iso, not 18.04.2)
  2. Login
  3. Delete ~/.config/lxsession/Lubuntu/desktop.conf
  4. Logout
  5. Login
  6. Press CTRL-ALT-L

  Expected behaviour
  ------------------

  The desktop session is locked and requires the password to unlock.

  Current behaviour
  -----------------

  Nothing happens.

  
  [Regression Potential]

  If the command in the Exec line does not exist, nothing is executed, so the behaviour does not change. Users with lxlock installed, won't notice any change in the behaviour.
  lxlock is a shell script, which calls light-locker-command (see: https://github.com/lxde/lxsession/blob/master/lxlock/lxlock#L27), so the regression potential is very, very small.

  
  [Other Info]

  Lubuntu uses another desktop environment from version 18.10 onwards.
  The only version, which contains the patched file is 18.04. The
  Lubuntu Team does not support Xenial anymore (16.04 has reached its
  end of life after 3 years of community support).

  
  -------------------------------------------------------------------------

  [Previous Description]

  Lubuntu 18.04 lxsession defines `lxlock` as the default for
  "lock_manager/command" which lxhotkey calls via `lxsession-default
  lock` when Ctrl-Alt-L is pressed. This should be changed in
  /etc/xdg/lxsession/Lubuntu/desktop.conf to `light-locker`.

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